{
  "manageEntity": {
    "action": "Save",
    "entityId": "1508942347",
    "entityType": "Track",
    "nonce": "0xd9cc28ade29a4a25e6394c52b7ba372f3f7823b7862e802e7ce55040c7b018d9",
    "signature": "0x8dd1b53a6e309ae65fa71be261e9d89b59df530cfe89e64fc95372f6884051f91cd109a87577500deec7d0cebef00f2a86fea99e23c71440ec39faf47e749b501b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}