{
  "manageEntity": {
    "action": "Save",
    "entityId": "279843",
    "entityType": "Track",
    "nonce": "0xd5316388ea66c2a954c0433411ba555c2ebac67edc70c23410e6d7a30577ed74",
    "signature": "0x8d8e358b46b31929a2ed0c551b5eb5d950e35670080c13d88e5cc7bcd8c6aeaf12432f972a0f09d95970d8360d009f5ef85e7dc479c21570b94e37591cc95a6b1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}