{
  "manageEntity": {
    "action": "Save",
    "entityId": "433723552",
    "entityType": "Track",
    "nonce": "0x1a0b8e83f4f68a000a362c74fbc372138ae1f3b5faad06a6f7247388fe1bd0ae",
    "signature": "0x58e0063adf04623cc07c1eadb60e1c197709371306673e5eb83e70e24d6a67da1dee70ebb9119f0659cf97c1d3b3ed44859529263276182c5dd01ebbd0420a431b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}