{
  "manageEntity": {
    "action": "Save",
    "entityId": "264400167",
    "entityType": "Track",
    "nonce": "0x376883c962703a77f165c96b4f617ff5472900de8d397a497464e0d8c1c5c59b",
    "signature": "0x64ed59559d63620a65c055710e616c891c8d736e2df8fb3d449bbb3ff393fa282f5b1eb648c3817ffd88f09e2a45fa4a0c74d2f65fc7f96ab26309e4314064e61b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}